fix: fixing sync return format missing flag layer

.github/workflows/build.yaml

@@ -124,32 +124,5 @@ jobs:
         with:
           go-version-file: 'flagd/go.mod'
 
-      - name: Install envoy
-        run: |
-          wget -O- https://apt.envoyproxy.io/signing.key | sudo gpg --dearmor -o /etc/apt/keyrings/envoy-keyring.gpg
-          echo "deb [signed-by=/etc/apt/keyrings/envoy-keyring.gpg] https://apt.envoyproxy.io jammy main" | sudo tee /etc/apt/sources.list.d/envoy.list
-          sudo apt-get update
-          sudo apt-get install envoy
-          envoy --version
-
-      - name: Workspace init
-        run: make workspace-init
-
-      - name: Build flagd binary
-        run: make build
-
-      - name: Run flagd binary in background
-        run: |
-          ./bin/flagd start \
-          -f file:${{ github.workspace }}/test-harness/flags/testing-flags.json \
-          -f file:${{ github.workspace }}/test-harness/flags/custom-ops.json \
-          -f file:${{ github.workspace }}/test-harness/flags/evaluator-refs.json \
-          -f file:${{ github.workspace }}/test-harness/flags/zero-flags.json \
-          -f file:${{ github.workspace }}/test-harness/flags/edge-case-flags.json &
-
-      - name: Run envoy proxy in background
-        run: |
-          envoy -c ./test/integration/config/envoy.yaml &
-
       - name: Run evaluation test suite
         run: make workspace-clean && cd test/integration && go clean -testcache && go test -cover

flagd/pkg/service/flag-sync/handler.go

@@ -63,9 +63,7 @@
 				return fmt.Errorf("error constructing metadata response")
 			}
 
-			flagMap := s.convertMap(payload.Flags)
-
-			flags, err := json.Marshal(flagMap)
+			flags, err := s.generateResponse(payload.Flags)
 			if err != nil {
 				s.log.Error(fmt.Sprintf("error retrieving flags from store: %v", err))
 				return status.Error(codes.DataLoss, "error marshalling flags")
@@ -87,13 +85,22 @@
 	}
 }
 
+func (s syncHandler) generateResponse(payload []model.Flag) ([]byte, error) {
+	flagConfig := map[string]interface{}{
+		"flags": s.convertMap(payload),
+	}
+
+	flags, err := json.Marshal(flagConfig)
+	return flags, err
+}
+
 // getSelectorExpression extracts the selector expression from the request.
 // It first checks the Flagd-Selector header (metadata), then falls back to the request body selector.
 //
 // The req parameter accepts *syncv1.SyncFlagsRequest or *syncv1.FetchAllFlagsRequest.
 // Using interface{} here is intentional as both protobuf-generated types implement GetSelector()
 // but do not share a common interface.
 func (s syncHandler) getSelectorExpression(ctx context.Context, req interface{}) string {
 	// Try to get selector from metadata (header)
 	if md, ok := metadata.FromIncomingContext(ctx); ok {
 		if values := md.Get(flagdService.FLAGD_SELECTOR_HEADER); len(values) > 0 {
@@ -139,7 +146,7 @@
 		return nil, status.Error(codes.Internal, "error retrieving flags from store")
 	}
 
-	flagsString, err := json.Marshal(s.convertMap(flags))
+	flagsString, err := s.generateResponse(flags)
 
 	if err != nil {
 		return nil, err
@@ -152,8 +159,8 @@
 
 // Deprecated - GetMetadata is deprecated and will be removed in a future release.
 // Use the sync_context field in syncv1.SyncFlagsResponse, providing same info.
 func (s syncHandler) GetMetadata(_ context.Context, _ *syncv1.GetMetadataRequest) (
 	*syncv1.GetMetadataResponse, error,
 ) {
 	if s.disableSyncMetadata {
 		return nil, status.Error(codes.Unimplemented, "metadata endpoint disabled")
@@ -169,7 +176,7 @@
 		return nil, fmt.Errorf("error constructing metadata response")
 	}
 
 	return &syncv1.GetMetadataResponse{
 			Metadata: metadata,
 		},
 		nil